Results on the autoignition and stabilization of ethanol hydrothermal flames in a Supercritical Water Oxidation (SCWO) reactor operating at constant pressure are reported. The flames are observed as luminous reaction zones occurring in supercritical water; i.e., water at conditions above its critical point (approximately 22 MPa and 374 °C). A co-flow injector is used to inject fuel (inner flow), comprising an aqueous solution ranging from 20%-v to 50%-v ethanol, and air (annular flow) into a reactor filled with supercritical water at approximately 24.3 MPa and 425 °C. Results show hydrothermal flames are autoignited and form diffusion flames which exhibit laminar and/or turbulent features depending upon flow conditions. Two orthogonal camera views are used; one providing a backlit shadowgraphic image of the co-flow jet and the other providing color images of the flame. In addition, spectroscopic measurements of flame emissions in the UV and visible spectrum are discussed.

报告了在恒定压力下运行的超临界水氧化（SCWO）反应器中乙醇水热火焰的自燃和稳定化结果。观察到火焰是超临界水中发生的发光反应区。即在高于其临界点（约22 MPa和374°C）的条件下注水。使用同流喷射器将燃料（内部流量）注入到反应器中，该燃料包含20％-v至50％-v乙醇的水溶液和空气（环状流），该反应器中充满了约24.3 MPa的超临界水， 425℃。结果表明，水热火焰会自动点燃，并形成扩散火焰，这些火焰会根据流动条件呈现出层流和/或湍流特征。使用两个正交相机视图；一个提供同向射流的背光阴影图像，另一个提供火焰的彩色图像。此外，还讨论了紫外和可见光谱中火焰发射的光谱测量。